How a Realist Hero Rebuilt the Kingdom , also known as Re:CONSTRUCTION - The Elfrieden Kingdom Tales of Realistic Brave, is a Japanese light novel series written by Dojyomaru and illustrated by Fuyuyuki. The story follows Kazuya Souma, a humanities-student-turned-hero as he pulls on his knowledge of realism and Machiavellianism in order to rebuild the kingdom. A manga adaptation by Satoshi Ueda began serialization online on Overlap's Comic Gardo manga website in July 2017. Digital publisher J-Novel Club has licensed both the light novel and manga for an English release. An anime television series adaptation by J.C.Staff aired from July 2021 to April 2022.

J.C.Staff Co., Ltd. is a Japanese animation studio founded in January 1986 by Tomoyuki Miyata, who previously worked at Tatsunoko Production. The studio's first release was Yōtōden in 1987. They have produced several well-known anime series, such as Azumanga Daioh, Bakuman, the A Certain Magical Index franchise, Date A Live III, The Disastrous Life of Saiki K., The Familiar of Zero, Food Wars!: Shokugeki no Soma, Is It Wrong to Try to Pick Up Girls in a Dungeon?, Maid Sama!, Mewkledreamy, One-Punch Man seasons 2 and 3, Revolutionary Girl Utena, Shakugan no Shana, Aria the Scarlet Ammo and Toradora!.